grapesjs/src/common/module.js

import { isString, isElement } from 'underscore';
import { createId } from 'utils/mixins';

export default {
  getConfig(name) {
    return this.__getConfig(name);
  },

  __getConfig(name) {
    const res = this.config || {};
    return name ? res[name] : res;
  },

  getAll() {
    return this.all || [];
  },

  getAllMap() {
    return this.getAll().reduce((acc, i) => {
      acc[i.get(i.idAttribute)] = i;
      return acc;
    }, {});
  },

  __initConfig(def = {}, conf = {}) {
    this.config = {
      ...def,
      ...conf
    };
    this.em = this.config.em;
  },

  __initListen(opts = {}) {
    const { all, em, events } = this;
    all &&
      em &&
      all
        .on('add', (m, c, o) => em.trigger(events.add, m, o))
        .on('remove', (m, c, o) => em.trigger(events.remove, m, o))
        .on('change', (p, c) =>
          em.trigger(events.update, p, p.changedAttributes(), c)
        )
        .on('all', this.__catchAllEvent, this);
    // Register collections
    this.cls = [all].concat(opts.collections || []);
    // Propagate events
    (opts.propagate || []).forEach(({ entity, event }) => {
      entity.on('all', (ev, model, coll, opts) => {
        const options = opts || coll;
        const opt = { event: ev, ...options };
        [em, all].map(md => md.trigger(event, model, opt));
      });
    });
  },

  __remove(model, opts = {}) {
    const { em } = this;
    const md = isString(model) ? this.get(model) : model;
    const rm = () => {
      md && this.all.remove(md, opts);
      return md;
    };
    !opts.silent && em && em.trigger(this.events.removeBefore, md, rm, opts);
    return !opts.abort && rm();
  },

  __catchAllEvent(event, model, coll, opts) {
    const { em, events } = this;
    const options = opts || coll;
    em && events.all && em.trigger(events.all, { event, model, options });
    this.__onAllEvent();
  },

  __appendTo() {
    const elTo = this.getConfig().appendTo;

    if (elTo) {
      const el = isElement(elTo) ? elTo : document.querySelector(elTo);
      if (!el) return this.__logWarn('"appendTo" element not found');
      el.appendChild(this.render());
    }
  },

  __onAllEvent() {},

  __logWarn(str) {
    this.em.logWarning(`[${this.name}]: ${str}`);
  },

  _createId(len = 16) {
    const all = this.getAll();
    const ln = all.length + len;
    const allMap = this.getAllMap();
    let id;

    do {
      id = createId(ln);
    } while (allMap[id]);

    return id;
  },

  __destroy() {
    this.cls.forEach(coll => {
      coll.stopListening();
      coll.reset();
    });
    this.em = 0;
  }
};